This video says about itself:
20 October 2017
In 2001, The Blue Planet opened our eyes to the worlds beneath the waves. A generation on, new science and technology allow us to journey deeper than ever before at the most crucial time in our ocean’s history. This is Blue Planet II. Take a deep breath.
Blue Planet II is narrated by Sir David Attenborough and features an original score by legendary composer Hans Zimmer. The series is set for UK broadcast on BBC One on October 29th and coming soon to BBC America in 2018. A BBC Studios Natural History Unit production, co-produced with BBC America, Tencent, WDR, France Télévisions and CCTV9. A BBC Open University Partnership.